Local standard of rest

The local rest frame (English: Local Standard of Rest, LSR short ) describes in astronomy a fictitious reference system whose origin is chosen at the current location of the sun. This point moves with the mean velocity of the stars in the solar neighborhood further and fully executes a perfect circular motion in the galactic disk around the center of our galaxy. As the sun for a revolution requires 2.3 × 108 years, the figure resulting from this assumption systematic errors on small time scales is negligible.

Application

The local rest system is useful in the study of the movement of objects in our galaxy and the structure of the Milky Way. In the local rest system -related movements of the overlapping effects of the proper motion of the sun relative to free their neighborhood.

Relative to the local rest frame of the Sun moves with about 20 km / s velocity in the direction of the constellation Hercules.

• Milky Way
• Astronomical coordinate system